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(No Model.) 2 Sheets-Sheet 1.

F. H. FIELD.

FIRE ALARM INDICATOR AND RECORDER.

No. 288,221. Patented Nov. 13, 1883.

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(No Model.) 2 Sheets-Sheet 2'.

F. H. FIELD.

FIRE ALARM INDICATOR AND RECORDER. No. 288,221.

Patented Nov. 13, 1883.

Witnesses: v Inqntor: fiflywm %W@' 4 N. PETERS. nm ulh inwim. wuhingmn. 0. c,

UNITED STATES PATENT OFFICE,

FREDERIC H. FIELD, OF PROVIDENCE, RHODE ISLAND.

FIRE-ALARM INDICATOR AND RECORDER.

SPECIFICATION forming part of Letters Patent No. 288,221, dated November 13, 183?,

To aZZ whom, it may concern Be it known that I, FREDERIc H. FIELD, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented a new and useful Fire-Alari'n Indicator and Recorder, of which the following is a specification.

My invention relates to improvements in a fire-alarm indicator and recorder, which is an appendage to the fire-alarm apparatus used in fire hose or engine stations, and which correctly designates the locality of a fire by indi cating, through the medium of numerals, the number of strokes upon a bell at different intervals, and also to record upon a ribbon of paper the number of the strokes of the bell; and the object of myimprovement is the combination of the indicator and recorder by means of mechanical arrangements hereinafter described, and which are illustrated in the accompanying drawings, in which- Figure l is a front elevation of the indicator and recorder, and Figs. 2 and 3 are sectional views of mechanism operating the indicator. Fig. i is a perspective view of cams f z, and i.

Similarletters refer to similar parts through out the several views.

Thebaek A, intermediate plate,B, and guidepiece G, support the mechanism of the apparatus. At each movement of the hammer, which is operated by the iire-alarm mechanism now in use to strike the alarm-bell, the lever D is raised, which, being connected by means of the arm E and rod F to the lever G, causes said lever also to rise.

The lever G has attached to it the arms a c a, which respectively support the two levers b b and point I). The lever b has its upper end hooked, for the purpose of catching onto one of the three pins 0 which project from the side of gear 1, and prevents said gear from turning when the alarmis not in action. XVhen the alarm is in action and is to strike but once, lever Z) is released from pin 0 and drops back into the space f, and as gear 1 revolves the cam f springs the hook to one side until it is brought in contact with the next pin 0, upon which it catches and stops the gear 5 but should the alarm be struck more than once the hook dropson the outside of cam f and passes over second pin, 0, but catches upon the third pin, 0.

Application filed August 13, 1883.

(No model.)

Gear 1 has attached to it the drum 0, around which passes the ribbon of paper (I, which is drawn from the roll (1, while the alarm is in action, by means of the weight 0, which revolves said drum. The friction-roll 0 prevents said paperirom slipping 011 the drum. The recording-point I) is attached to and re ceives its motion to perforate thepaperd from lever G.

The end of arm a, at each stroke of the alarm, is made to push against the end of cam i, which is attached to the side of disk :0, said disk being held against gear 1 by means of the spring f, which produces suilicient friction between the gear and disk to cause said disk -to revolve with said gear when the end of cam i is not in contact with arm a. Said spring fdoes not produce so much friction between the gear and disk as to prevent said disk from being turned bythe arm a in the opposite direction from the movement of gear 1.

The arm a is attached to gear 2, and has its lower end held against cam 27 by means of the weight \V. on the arm I, acting through gears 4 3 2. The weight \V also acts to move to the right, through the gears 4 5 6, the gearrack 7, which is supported and guided by the bracket 72'. The barf is hinged to gear-rack 7, and has projecting from it the foot g. The bar f and the arm 9, which is attached to the same shaft that the lever b is attached to, are in the same vertical plane, so that in whatever position, right or left, rack 1 may be moved said bar remains over said arm.

at m m represent three numbered plates, which slide perpendicularly in the guidepieces 0, and are held in position by means of three pivoted springlatchcs, a, which latch onto the catches 0. Projecting from these latches are the arms a, which are located in a horizontal plane just above the foot y. The escape-wheel S, witlr its pendulum a", regulates the speed of gear 1.

Having described the mechanism of myimprovement and set the apparatus ready for action, which has to be done after each alarm by placing the numbered plates at their extreme height of movement with their corresponding numbers horizontal with each otherrack 7 to the extreme left of its movement, gear 1, with its drum 0 and ribbon of paper held by hooked lever 1), disk a", with its cam a" supporting the lower end of arm-a', and its cam z, with its end at the left held within a short distan cc of the arm aits operation is as follows: For illustration,

a fire occurs in district 211. Now, when the alarm is put into operation and is receiving its first stroke upon the bell, it puts in motion the lever D, which actuates lever G and causes the recording-point b to perforate the paper, and at the same time releases the hooked lever 12 from one of the pins 0, which allows theweighted ribbon of paper to set gear 1 in motion,which unwinds the paper from the roll (1, so as to present a fresh surface to the recording-point at the next stroke of the alarm. The first stroke of the alarm not only released the hooked lever 1) and perforated the paper, but it also moved arm a and 'the lever b, which rests against it, which causes the arm to. lift the barf with its foot g, which lifts the arm n of the latch 02., and thus releases said latch from the first lower catch, 0, on numbered plate m,

and allows said plate to drop down until it is caught on the second catch, 0, by thereaction of latch a, thus bringing to view (through an aperture in a suitable covering over-the plates or mm, not shown in the drawings) the number of the stroke on the bell, which is 1. Should a second stroke of the bell. occur (as it will in this instance) within an in erval of three seconds,the above operation will be repeated and bring to viewnumber2 011 plate m. Thus each stroke,with an intervalof three seconds, up to the number of ten is shown from plate m. \Vhile arm a is moving lever b (as it does at each stroke of the hell) it also pushes the diskw and its cams forward to a certain point, which at the first stroke of a figure shifts the position of the end of arm a from cam i to cam The arms G and a drop back after each stroke of the bell, but the disk and cams do not instantly follow said arm a back, but, being held in frictional contact with gear 1,are slowly returned toward their first position as gear 1 is rotated by weight 0, its speed being regulated -by the escapement. space of three seconds between the strokes of a figure, so to speak, the cams cannot move back far enough to let arm a. escape from cant i,- but when the disk moves back far enough for the space of five seconds before being driven forward again by arm a the end of arm a is permittedto escapethrough the space between the two camsvl 13, and thus free itself from said cam c, which will allow said arm a, with its 'that holds up plate m.

During thegear 2, to make a revolution which will bring the end of the arm to its first position on cam .2" and the foot y under the arm of the latch Should the bell be struck again after the interval of five seconds, as it is in this instance, the apparatus is put in motion and the stroke of the bell is shown from plate m, which is 1, and which is recorded in a space by itself on the paper, as in the action of the first stroke of the bell. After the number of the stroke has been indicated from plate 111/ and recorded, the above operation is repeated to cause plate'mto indicate a stroke of the bell, which is also recorded, thus completing the first round of strokes for district 211, after which, whether said round is indicated, as in the present instance, by three figures or by one or two figures, there occurs an interval of twenty seconds, during which gear 1 has turned disk wfar enough backward to allow the end of arm a! to pass off the end of cam i, which allows gear 2 to be revolved by weight XV and carry rack 7 to the extreme right, away from any subsequent action of foot g.- After the number of the district has been indicated and rack 7 moved to the extreme right, the recording mechanism continues to act, recording the number of the district in separate spaces on the paper, until the alarm has been given a proper number of times. Thus any number ofv the strokes of the alarm indicating the district where the fire occurs is indicated but once and recorded as mauy'ti mes as given by my improved combination of mechanism.

WVhat I claim, and desire to secure by Let ters Patent of the United States, is

'1. In afire-alarm indicator and recorder,tl1e lever G, having attached to it the perforatingpoint I) and the two arms a, a, which are in combination with levers b'b, arm g, barf",

foot 9, arms a, latches n, and plates m m m,

all arranged in the manner and for the purpose specified. V

2. The lever G, arm a, and friction-disk :v, with its, cams i i, in combination with gear 1, arm a, and gear 2, all of which are arranged and operated substantially as and for the purpose set forth.

FREDERIC H. FIELD."

Witnesses:

ELMER'E. BROWN, J O HN H. CRowELL. 

